The EPA (U.S. Environmental Protection Agency) Region 7 announced that it will be working with residents in four Kansas counties (Sedgwick, Butler counties, Sumner and Harper) to check dangerous levels of carbon dioxide, methane or other soil vapors seep into building spaces, especially basements, after several major rainfall events in the areas.

Depleted oxygen levels (below 19.5 percent) in indoor air can result in elevated levels of carbon dioxide, methane and soil gases.

Because carbon dioxide is odorless and colorless, families living in homes affected by high concentrations typically aren’t aware of the problem immediately. Symptoms like headaches, laboured breathing, exhaustion and pilot flame problems, are physical signs. Prolonged exposure to high concentrations can result in unconsciousness and asphyxiation.

So it is important to check that heating, ventilation and air conditioning systems are operating within guidelines.

The EPA is also conducting research in the area by taking samples to be analyzed in an effort to determine if there are chemical pollutants or contamination in the ground water and soil that may be causing or contributing to the problem.

Home owners should be aware that during periods of extremely heavy rainfall and flooding, the surface of the ground can become sealed off with water or shallow ground water levels may rise. Under these conditions, soil gases that would normally seep into the air outside can be forced into basements through cracks in walls, floors or foundations, service lines or sump pump pipe exposure. This can cause oxygen depletion.

One short-term remedy for stopping soil gas vapours entering into building is to fill cracks, joints, gaps and openings in walls, floors, suspended floors and around service lines, with an impermeable seal such as polyurethane chalk or hydraulic cement.

Fitting a wall-mounted gas analyser/monitor can also be considered. Top models can cost thousands, but even a simple cheaper carbon dioxide detector could be beneficial.

You can avoid poisonous gases

Increased air venting and forced air venting in basements and other confined spaces are other options.

Residents who are concerned and experiencing symptoms such as pilot light problems, can contact the EPA for assistance.

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